public void Report_DivisorIsZero_ThrowsException()
{
// ARRANGE
int reported = 0;
Action <double> action = (d) =>
{
reported = (int)d;
};
ScanningProgress scanningProgress = new ScanningProgress(action, 0, 0);
// ACT
scanningProgress.Report(1);
// ASSERT (handled with ExpectedException)
}
public void Report_AddendAddedToDivision()
{
// ARRANGE
int reported = 0;
Action <double> action = (d) =>
{
reported = (int)d;
};
ScanningProgress scanningProgress = new ScanningProgress(action, 50, 2);
// ACT
scanningProgress.Report(100);
// ASSERT
Assert.AreEqual(100, reported);
}
public void Report_DivisorReducesValue()
{
// ARRANGE
int reported = 0;
Action <double> action = (d) =>
{
reported = (int)d;
};
ScanningProgress scanningProgress = new ScanningProgress(action, 0, 2);
// ACT
scanningProgress.Report(100);
// ASSERT
Assert.AreEqual(50, reported);
}
public void Report_ValueGreaterThan100Percent_Is100Percent()
{
// ARRANGE
int reported = 0;
Action <double> action = (d) =>
{
reported = (int)d;
};
ScanningProgress scanningProgress = new ScanningProgress(action);
// ACT
scanningProgress.Report(9001);
// ASSERT
Assert.AreEqual(100, reported);
}
public void Report_UpdatesControlValue()
{
// ARRANGE
int reported = 0;
Action <double> action = (d) =>
{
reported = (int)d;
};
ScanningProgress scanningProgress = new ScanningProgress(action);
// ACT
scanningProgress.Report(69);
// ASSERT
Assert.AreEqual(69, reported);
}
/// <summary>
/// <para>Performs the scan process</para>
/// <para>First the storage backend is queried for existing scanned locations.
/// Then these existing locations are compared with the user selected locations to
/// determine which locations are "new" and which are "rescans".</para>
/// <para>Locations (and records) that are existing but not now user selected
/// will be purged via
/// <see cref="ScannedFileStore.PurgeLocationsAsync(List{string})"/></para>
/// <para>After determining these locations
/// <see cref="ScannedFileStore.ScanLocationsAsync(List{string}, IProgress{int})"/> is called for
/// new scans, and <see cref="ScannedFileStore.RescanLocationsAsync(List{string}, IProgress{int})"/>
/// for rescans.</para>
/// <para>Any <see cref="Exception"/> should be handled and logged as an error.</para>
/// </summary>
internal async Task BeginScanAsync()
{
List <string> locations = Locations.Select(t => t.Path).ToList();
ScanningProgress progress = new ScanningProgress((d) =>
{
Progress = (int)d;
}, 0, 2);
try
{
// Previously scanned locations
List <string> scannedLocations = await _scannedFileStore.ListScannedLocationsAsync();
// Determine all locations that are not in scannedLocations, these are new locations
List <string> newLocations = locations.Except(scannedLocations).ToList();
// Determine all scannedLocations that are in Locations, these are rescan locations
List <string> rescanLocations = scannedLocations.Where(t => locations.Contains(t)).ToList();
// Determine all locations that are in scannedLocations, but not in Locations.
// We will purge scanned files from these locations
List <string> purgeLocations = scannedLocations.Except(locations).ToList();
// Purge any unneeded locations
await _scannedFileStore.PurgeLocationsAsync(purgeLocations);
// Scan new locations
await _scannedFileStore.ScanLocationsAsync(newLocations, progress);
progress.Addend = 50; // Update the Addend so that value will be reporeted correctly
// Rescan previously scanned locations
await _scannedFileStore.RescanLocationsAsync(rescanLocations, progress);
progress.Report(100);
}
catch (Exception ex)
{
_logger.Error(ex, "An error occurred during the scanning process.");
}
}